Wall Parapet Roof Flashing

Many flat and low slope roofs are surrounded by parapet walls.

Wall parapet roof flashing.

This detail may be used where wall heights are 24 48 inches above roof surface. Parapet wall caps are custom fabricated to any measurements and it usually measure 10 in length but can also be bent in 12 lengths. This detail shows a flashing condition at a vertical wall or parapet. At the edge of these roofs parapet walls are commonly found and are vulnerable to leaks if not flashed correctly.

1 roll out bitumen flashing atop the wall from end to end with the. Another good reason for projecting the through wall flashing beyond the face of the wall is to prevent the outlet edge of the masonry flashing from being inadvertently covered when the roof membrane and roof base flashing are replaced. This would seal off the masonry flashing and route the water under the roofing. The roofing squares are locked into a 20 oz.

The counterflashing laps the base flashing a minimum of 3. Wsrca suggests for walls 24 inches and taller that wall cladding be considered in lieu of membrane wall flashings per detail tp 8a. This short repair video shows how to tie in a flat roof to a parapet wall with an l flashing using only surecoat roof coating and poly mesh. As a roof ages the roofing seams begin to separate often beginning where the flat roof meets the parapet wall.

On walls greater than 36 inches high membrane wall flashing sheets are suggested to be strapped i e installed vertically.